package cn.com.open.ms.ecgpaasdatarest.log;

import org.springframework.http.HttpStatus;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class CorsFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
    	HttpServletResponse response = (HttpServletResponse) res;
		response.setHeader("Access-Control-Allow-Origin", "*");
		response.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, OPTIONS, DELETE");
		response.setHeader("Access-Control-Max-Age", "3600");
		response.setHeader("Access-Control-Allow-Headers", "*");
        response.setHeader("Content-type", "application/json;charset=UTF-8");
        response.setCharacterEncoding("UTF-8");
        HttpServletRequest request = (HttpServletRequest)req;
        if (request.getMethod().toLowerCase().equals("options")) {
            response.setStatus(HttpStatus.OK.value());
            return;
        }

		chain.doFilter(req, res);
    }

    @Override
    public void destroy() {

    }
}
